Diesel (noun)

1. A type of internal combustion engine that operates using compression rather than a spark.
2. A heavy oil obtained from petroleum, used as fuel for diesel engines and in heating.

Origin:

Early 20th century: named after rudolf diesel (1858–1913), the german engineer who invented the diesel engine.

Examples:

1. The truck was fitted with a diesel engine.
2. He drove a diesel car that was more fuel-efficient.
3. The generator was powered by diesel fuel.
4. The shipping company used diesel to fuel their boats.
5. The diesel engine was more reliable and efficient than gasoline engines.